Notwithstanding your ever so reasonable nature... I believe Iran is supplying the IEDs the same way I believe that Saddam had WMDs and high level ties to Al Qaeda.
Iran supports groups that resist Israeli expansion. It may be more to your liking to see Israel murder Arab children by the tens of thousands... but hey, that's you.
Those IEDs Iran has supplied to the criminals in Iraq have maimed 10's of thousands of our troops.
Hook line and f*cking sinker... What a crock of shit. How many times are you going to believe these guys?